original description
Godwin-Austen, H. H. (1881). On the land-shells of the Island of Socotra collected by Prof. Bayley Balfour. Part II. Helicaceae. <em>Proceedings of the Zoological Society of London.</em> 49(4): 801-812, pls 68-69. London [April]., available online at https://www.biodiversitylibrary.org/page/30760030
page(s): 811, Plate LXIX. fig. 5 [details]
From editor or global species database
Type locality "Sokotra, south side of the island, from limestone rocks, altitude 1000 feet" [details]